/**
 *    Copyright 2006-2020 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.mybatis3.ListUtilities;
import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;
import org.mybatis.generator.config.PropertyRegistry;

/**
 * @author Jeff Butler
 */
public class UpdateByPrimaryKeySelectiveElementGenerator extends
        AbstractXmlElementGenerator {

    public UpdateByPrimaryKeySelectiveElementGenerator() {
        super();
    }

    /**
     * modified
     * update
     * -去除parameterType
     * -替换table参数
     * -忽略createTime
     * -忽略creator
     * -自动生成修改时间
     * -替换if标签为普通文本
     */
    @Override
    public void addElements(XmlElement parentElement) {
        XmlElement answer = new XmlElement("update"); //$NON-NLS-1$

        answer.addAttribute(new Attribute(
                "id", introspectedTable.getUpdateByPrimaryKeySelectiveStatementId())); //$NON-NLS-1$

//        String parameterType;
//
//        if (introspectedTable.getRules().generateRecordWithBLOBsClass()) {
//            parameterType = introspectedTable.getRecordWithBLOBsType();
//        } else {
//            parameterType = introspectedTable.getBaseRecordType();
//        }
//
//        answer.addAttribute(new Attribute("parameterType", //$NON-NLS-1$
//                parameterType));

        context.getCommentGenerator().addComment(answer);

        StringBuilder sb = new StringBuilder();

        sb.append("update ");
//        sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
        answer.addElement(new TextElement(sb.toString()));
        answer.addElement(getTable());//替换table

        XmlElement dynamicElement = new XmlElement("set"); //$NON-NLS-1$
        answer.addElement(dynamicElement);

        String createTime = context.getProperty(PropertyRegistry.COMMENT_CREATE_TIME);
        String ignore = context.getProperty(PropertyRegistry.UPDATE_IGNORE);
        String modifiedTime = context.getProperty(PropertyRegistry.COMMENT_MODIFIED_TIME);

        for (IntrospectedColumn introspectedColumn : ListUtilities.removeGeneratedAlwaysColumns(introspectedTable
                .getNonPrimaryKeyColumns())) {
            String javaProperty = introspectedColumn.getJavaProperty();
            String columnName = MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn);
            //忽略createTime，ignore
            if ((createTime != null && createTime.equalsIgnoreCase(columnName)) || (ignore != null && ignore.equalsIgnoreCase(columnName))) {
                continue;
            }
            if (modifiedTime != null && modifiedTime.equalsIgnoreCase(columnName)) {
                sb.setLength(0);
                sb.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
                sb.append("=now(),");
                dynamicElement.addElement(new TextElement(sb.toString()));
            } else {
                sb.setLength(0);
                sb.append("<if test=\"");
                sb.append(javaProperty);
                sb.append("!=null\">");
                sb.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
                sb.append("=#{");
                sb.append(javaProperty);
                sb.append("},</if>");
                dynamicElement.addElement(new TextElement(sb.toString()));
//                sb.setLength(0);
//                sb.append(javaProperty);
//                sb.append(" != null"); //$NON-NLS-1$
//                XmlElement isNotNullElement = new XmlElement("if"); //$NON-NLS-1$
//                isNotNullElement.addAttribute(new Attribute("test", sb.toString())); //$NON-NLS-1$
//                dynamicElement.addElement(isNotNullElement);
//                sb.setLength(0);
//                sb.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
//                sb.append(" = "); //$NON-NLS-1$
//                sb.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn));
//                sb.append(',');
//                isNotNullElement.addElement(new TextElement(sb.toString()));
            }
        }

        boolean and = false;
        for (IntrospectedColumn introspectedColumn : introspectedTable
                .getPrimaryKeyColumns()) {
            sb.setLength(0);
            if (and) {
                sb.append("  and "); //$NON-NLS-1$
            } else {
                sb.append("where "); //$NON-NLS-1$
                and = true;
            }

            sb.append(MyBatis3FormattingUtilities
                    .getEscapedColumnName(introspectedColumn));
            sb.append(" = "); //$NON-NLS-1$
            sb.append(MyBatis3FormattingUtilities
                    .getParameterClause(introspectedColumn));
            answer.addElement(new TextElement(sb.toString()));
        }

        if (context.getPlugins()
                .sqlMapUpdateByPrimaryKeySelectiveElementGenerated(answer,
                        introspectedTable)) {
            parentElement.addElement(answer);
        }
    }
}
